Improvement in electro-magnetic car-brakes



J. OLMSTED.

BLEOTRO MAGNETIC GAR BRAKE.

Patented Apr. 27

I No. 89,495.

. I I i e s ii tlmtml AM new gee

gem cam...

JOSEPH OLMSTEDiQF GALESBURG, ILLINOIS.

Letters Patent No. 89,495, dated April 27, 1869.

IMPROVEMENT IN ELECTRO-MAG-NETIC CAR-BRAKES.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom tt'may concern;

Be it known tliatl, J osnrn Omrscrnn, of Galesburg, in the county of Knox, and State of Illinois,

have invented certain new and useful Improvements in Electro-Magnetic Gar-Brakes; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference beinghad to the accompanying drawfrom point 19, fig. 1.

Figure 5 'is a side view of the device for connecting the wires between the cars.

Figure 6 is a cross-section of fig. 4, on the plane of the line 9-9.

Figure 7 is a cross-section of fig. 2, on the line 8-8.

This invention relates to improvements in electromagnetic car-brakes; and

The invention consists- First, in connecting the circuit with magnets and armature, by means of a revolving connection, with two or more bearings upon each connection ring, each being independent of the other, and joined to one common conductor, thereby securing a sure connection. a

Second, in the arrangement of an amature, the shaft of which gears with the car-axle, and communicates the motion of said axle to the shaft carrying the magnets, on the completion at any time of the electric circuit.

Third, in an adjustable armature-plate, as hereafter fully described.

Similar letters of reference indicate corresponding parts in all of the drawings.

Letter A represents an ordinary single truck-frame.

B represents the wheels, and

f, the axles of the frame A;

U represents a shaft, supported in bearings T T in the braces S S. v

Z represents a circular disk or friction-plate, permanently attached to the shaft U.

y y, fig. 2, represent h'orse-shoe magnets, the poles of which are permanently attached to and seated in the plate Z, and insulated by brass or other insulating fastenings.

k" k, figs. 4 and 6, represent rings, grooved on their outer surfaces, and attached to the shaft U, by the insulators Z Z. The electric wire passes from one of these rings is", and forming the helices y y, returns, andpassing through the insulator l, connects with the other ring is.

and having at their lower ends, arms a" of spring wire, fitting in the grooved rings It It, and bent or curved, as shown at fig. 6, in such a way as to always strike the ring it, in two or more places, so as to always preserve a sure connection betweenthe wires W and the rings It" It.

The springs It It serve to keep the wires W" W always pressed close to the rings k.

suitable place on. the train. One of the wires is cut in- .two where it passes the top of wires W W, and one of the cut ends of its-attached to wire W", and the other to wire W. e

2, fig. 2, is represented in a line with shaft U. This shaft 2 is supported by brackets S S, and carries on one end the armature a. and near its centre the cogwheel (I.

gearing with the wheel d, in such way that the shaft 2, wheel d, and armature a are always revolving with the car-axle.

0 represents the ordinary car-brake bars.

G G represent levers pivoted to the brake-bars by the clevis H.

z is a rod, connecting the lower ends of the levers G G.

K is a chain and rod, connecting the upper end of the lovers G G.

and carrying two pulleys, N and P, thechain K bein J represents a chain, connecting the lower end of lever M with the shaft U, so that revolving the said shaft U will, by winding up the chain j, draw with greatly increased power, through the medium of the said levers, on the brakes.

r represents a block, secured in each end of every car, with fiat wires 8, attached thereto, as shown at fig. 5, in such manner that their outer ends will always spring together, or close automatically.

t, fig. 5, represents a dart-shaped block, one of which is attached to either end of a cord, of any suitable length, and carrying the two wires X X. The darts T being. slipped between the spring-jaws s, in the adjacent ends of two cars, will formthe proper circuit connections, and at any time should part of the train be detached, and the dart be withdrawn, the

completed.

Fig. 7 .shows a cross-section of armature-plate a, fig. 2, on the line 8 S, and the manner of inserting the shaft 2, with a spline, 3, cast solid thereon, so that the plate a, may be held firmly in the direction of its revolutions with the shaft 2, and he allowed freedom in W W represent wires, supported by the brace i, I

X X represent the electric wires, proceeding from the poles of the battery, which may be placed in any 7 e represents a pinion-wheel on the can-axle fiend- M represents a lever,'pivoted between the pieces R, I

passed over the upper pulley and under the lower one.

spring-jaws s will close, and the circuit may still be other directions for the purpose of allowing it to almaguetizing and adhering to the friction-plate '2,

thereby imparting the revoly'iug motion of the armature. to the plate Z and shaft U, winding the chain j on shaft U, and applying the brakes, and the moment the circuit is broken, and the magnetic attraction lost,

the brakes will be released.

7 The brake-bars 0 being attached to the ears in the usual method, the whole device admits of being applied to the ordinary brakes and attachments.

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is

1. The insulated grooved rings 7.1 k, the wires rings 76, springs h h, and shaft U, arranged substantially as described, and for the purpose set forth.

2. The arrangement of the pinious eaud cl, shaft 2, and revolving armature a, for transmitting motion to the friction-plate Z and shaft U, substantially as described.

3. The arrangement of the shaft U, friction-plate Z, and the insulated magnets y y, all constructed and operating in the manner and for the purposes herein set forth and described.

4. The revolving armature-plate a, loosely attached as' described, to the shaft 2, so that the plate a may be held firmly in the direction of its revolutions with the shaft 2, and be allowed freedom'in other directions, for the purpose of allowing it to always adjust itself exactly to the face of the friction-plate Z.

Signed at Galesburg, this 21st day of October, 1868.

JOSEPH OLMSTED. Witnesses:

W. B. RICHLRDS, J. B. HABSH.

W, having arms with two or more hearings on the 

